The invention discloses a method for extracting tea oil by a
microwave-assisted aqueous enzymatic method, which is characterized by comprising the following steps of: (1) hulling tea seeds,
drying the hulled tea seeds for 0.5 to 2 hours at 60 to 105 DEG C, and performing crushing; (2) weighing tea seed kernels obtained by the crushing, performing
microwave treatment for 50 to 90 seconds, adding the treated tea seed kernels into 0.05 to 1 mol / L alkaline
salt solution according to the weight / volume (w / v) of 1:3-6, performing water bath for 30 minutes at 90 DEG C, performing
centrifugation and extracting upper-layer oil; (3) adjusting the pH value of a part of de-oiled
mixed solution to be 4.0 to 4.5 by using acid solution, heating complex
enzyme with the v / w of 0.5 to 4 percent, performing
thermal treatment for 2 to 6 hours at 40 to 50 DEG C, adjusting the pH to be 8 to 9 by using alkaline solution, performing the
centrifugation and extracting the upper-layer oil; and (4) combining the oil obtained in the steps (2) and (3) and performing
vacuum drying. The method of the invention is simple, the extraction conditions are moderate, required equipment is relatively less and the production cost is low; over 36 percent of tea
oil can be obtained at low temperature without any
organic solvent; the obtained tea oil does not contain any trans
fatty acid and foreign toxic residue, and has light color, a low
acid value and a high nutritional value; tea
saponin, proteins,
carbohydrate and other
nutrition in residues are easy to extract and utilize; and with a
biochemical oxygen demand (BOD) value and a
chemical oxygen demand value,
wastewater produces less
pollution and is easy to treat.